Automatic liquid level control system for nylon 66 liquid seal tank

Abstract

The utility model relates to the technical field of nylon 66 production, in particular to an automatic liquid level control system for a nylon 66 liquid seal tank. The nylon 66 liquid seal tank liquid level automatic control system comprises a liquid seal tank, the top of the liquid seal tank is provided with a low-pressure desalted water pipeline and a tail gas pipeline, the low-pressure desalted water pipeline is provided with an adjusting valve, the liquid seal tank is provided with a liquid level detection device and an alarm device, and the liquid level detection device, the alarm device and the adjusting valve are electrically connected with a controller. And an overflow pipeline is arranged at the upper part of the liquid seal tank and is connected with the pit. According to the utility model, the liquid level of the liquid seal tank is accurately and automatically controlled, and the production stability and the product quality are improved; manual intervention is reduced, the labor intensity is reduced, and the production efficiency is improved; the alarm function is achieved, abnormal conditions can be found in time, and production safety is guaranteed; the use amount of low-pressure desalted water is reduced, and the load of public works is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nylon 66 production, in particular to an automatic control system for the liquid level of a nylon 66 liquid seal tank. Background Art

[0002] During the production process of nylon 66, oxygen has various effects on nylon salt solution. First of all, oxygen may cause oxidation reaction of nylon salt solution, thus affecting its chemical stability and performance. Under certain conditions, the oxidation effect may change the molecular structure of nylon salt, and then affect its subsequent polymerization process and the quality of the obtained nylon products. In terms of physical properties, the presence of oxygen may affect parameters such as the solubility and viscosity of nylon salt solution. Long-term exposure to oxygen may also cause deterioration of nylon salt solution, generating impurities or reducing its purity. In addition, oxygen may also react with some additives or impurities in nylon salt solution, further changing the properties and composition of the solution. If the liquid level of the liquid seal tank fluctuates, it will directly affect the oxygen content in the nylon 66 salt solution tank. Therefore, the stability of the liquid level of the liquid seal tank is crucial for the continuity of production and product quality. However, the traditional liquid level control method often relies on manual monitoring and manual adjustment, which is not only inefficient, but also difficult to accurately control the liquid level, easily leading to production fluctuations and unstable product quality. Summary of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides an automatic control system for the liquid level of a nylon 66 liquid seal tank, which can realize accurate automatic control of the liquid level, improve production efficiency and product quality.

[0004] The utility model is realized through the following technical solutions:

[0005] The automatic control system for the liquid level of a nylon 66 liquid seal tank described in the utility model includes a liquid seal tank. The top of the liquid seal tank is airtight and is provided with a low-pressure desalinated water pipeline and a tail gas pipeline. A regulating valve is provided on the low-pressure desalinated water pipeline. The liquid seal tank is provided with a liquid level detection device and an alarm device.

[0006] Preferably, the end of the tail gas pipeline is located at the bottom inside the liquid seal tank body.

[0007] Preferably, the liquid level detection device, the alarm device and the regulating valve are electrically connected to a controller respectively.

[0008] Preferably, an overflow pipeline is provided on the upper part of the liquid seal tank, and the overflow pipeline is connected to a sump.

[0009] Preferably, a jacket is provided around and at the bottom of the liquid seal tank body. The jacket is provided with a circulating water inlet pipeline and a circulating water outlet pipeline. Valves are provided on both the circulating water inlet pipeline and the circulating water outlet pipeline. A pipeline is connected between the circulating water inlet pipeline and the circulating water outlet pipeline, and a valve is also provided.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. The present utility model realizes the precise automatic control of the liquid seal tank liquid level, improving the production stability and product quality;

[0012] 2. The present utility model reduces manual intervention, lowers the labor intensity, and improves the production efficiency;

[0013] 3. The present utility model has an alarm function, can detect abnormal situations in a timely manner, and ensure production safety;

[0014] 4. The present utility model reduces the usage amount of low-pressure desalted water, reducing the load on the utility engineering;

[0015] 5. The present utility model reduces wastewater, achieving energy conservation and emission reduction. Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of the automatic control system for the liquid level of the nylon 66 liquid seal tank;

[0017] Among them: 1. Liquid seal tank; 2. Low-pressure desalted water pipeline; 3. Tail gas pipeline; 4. Control valve; 5. Liquid level detection device; 6. Alarm device; 7. Controller; 8. Overflow pipeline; 9. Sump; 10. Jacket; 11. Circulating water inlet pipeline; 12. Circulating water outlet pipeline. Detailed Embodiments

[0018] The following will further elaborate on the preferred solutions of the present utility model in conjunction with the drawings.

[0019] Embodiment 1

[0020] As Figure 1 shown, the automatic control system for the liquid level of the nylon 66 liquid seal tank described in the present utility model includes a liquid seal tank 1. The top of the liquid seal tank 1 is airtight and is provided with a low-pressure desalted water pipeline 2 and a tail gas pipeline 3. The low-pressure desalted water pipeline 2 is provided with a control valve 4. The liquid seal tank 1 is provided with a liquid level detection device 5 and an alarm device 6.

[0021] The end of the tail gas pipeline 3 is located at the bottom inside the tank body of the liquid seal tank 1.

[0022] The liquid level detection device 5, the alarm device 6, and the control valve 4 are respectively electrically connected to the controller 7. The liquid level detection device 5 adopts a high-precision liquid level sensor, which can accurately detect the minute changes in the liquid level. The controller 7 adopts an advanced PID control algorithm, which can quickly respond to the liquid level changes and achieve precise control. The control valve 4 can accurately regulate the liquid flow rate.

[0023] An overflow pipeline 8 is provided at the upper part of the liquid seal tank 1, and the overflow pipeline 8 is connected to the sump 9.

[0024] The liquid seal tank 1 is provided with jackets 10 around its body and at the bottom. The jackets 10 are provided with a circulating water inlet line 11 and a circulating water outlet line 12. Valves are provided on both the circulating water inlet line 11 and the circulating water outlet line 12. A pipeline is connected between the circulating water inlet line 11 and the circulating water outlet line 12, and a valve is also provided.

[0025] The working process of the present utility model:

[0026] The liquid level detection device 5 is used to detect the liquid level height in the liquid seal tank 1 in real time and send the detection signal to the controller 7. The controller 7 compares the received liquid level detection signal with the preset liquid level value, calculates the liquid level deviation, generates a control signal according to the preset control algorithm, and sends it to the regulating valve 4. The regulating valve 4 adjusts the liquid inlet volume of the liquid seal tank 1 according to the control signal, thereby realizing the automatic control of the liquid level. When the liquid level exceeds the preset safety range, the controller 7 triggers the alarm device 6 to emit an audible and visual alarm signal to remind the operator to handle it in time.

[0027] When the liquid level reaches the height of the overflow pipeline 8, the liquid in the liquid seal tank 1 is discharged into the sump through the overflow pipeline 8. According to actual production, to ensure the cleanliness of the sealing water, the water in the liquid seal tank 1 can be replaced regularly, or a small amount of overflow can be set every day.

Claims

1. A nylon 66 liquid seal tank liquid level automatic control system, characterized in that: The invention comprises a liquid sealing tank (1), the top of the liquid sealing tank (1) is sealed and provided with a low-pressure desalted water pipeline (2) and an exhaust gas pipeline (3), the low-pressure desalted water pipeline (2) is provided with a regulating valve (4), and the liquid sealing tank (1) is provided with a liquid level detection device (5) and an alarm device (6).

2. The nylon 66 liquid seal tank liquid level automatic control system according to claim 1, characterized in that: The end of the tail gas pipeline (3) is located at the bottom of the liquid seal tank (1).

3. The nylon 66 liquid seal tank liquid level automatic control system according to claim 1, characterized in that: The liquid level detection device (5), the alarm device (6), and the regulating valve (4) are electrically connected to the controller (7) respectively.

4. The nylon 66 liquid seal tank liquid level automatic control system according to claim 1, characterized in that: An overflow pipeline (8) is provided at the upper portion of the liquid seal tank (1).

5. The automatic liquid level control system for nylon 66 liquid seal tank according to claim 4, characterized in that: The overflow pipeline (8) is connected to the pit (9).

6. The automatic liquid level control system for nylon 66 liquid seal tank according to claim 1, characterized in that: A jacket (10) is provided around and at the bottom of the liquid seal tank (1).

7. The nylon 66 liquid seal tank liquid level automatic control system according to claim 6, characterized in that: The jacket (10) is provided with a circulating water inlet line (11) and a circulating water outlet line (12), and both the circulating water inlet line (11) and the circulating water outlet line (12) are provided with valves.

8. The automatic liquid level control system for nylon 66 liquid seal tank according to claim 7, characterized in that: A pipeline is connected between the circulating water inlet line (11) and the circulating water outlet line (12), and a valve is provided.

Images